Arimidex is run during cycle to control bloat by reducing circulating estrogen. It is not used post cycle due to it being silghtly supressive to the HTPA. If you are concerned about bloat I would run it .5mg every other day. But since you are running a DHT precursor along with M1T, which doesnt readly convert to estrogen, I would not run it at all. Since DHT reduces estrogen by itself, there is no need to run arimidex. For post cycle for a 4 week run I would choose Nolvadex. I would run it at 40mg/day for 2 weeks then reduce dosage to 20mg/day for 2 more weeks and call post cycle therapy done. Since you are stacking 2 methyl orals I would run some Milk Thistle, NAC, or R-Ala throughout the cycle and continue all year round.